import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/users/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'

Vue.use(VueRouter)

const router = new VueRouter({
  routes: [{
    path: '/',
    redirect: '/login'
  }, {
    path: '/login',
    component: Login
  }, {
    path: '/home',
    component: Home,
    redirect: '/welcome',
    children: [{
      path: '/welcome',
      component: Welcome
    }, {
      path: '/users',
      component: Users
    }, {
      path: '/rights',
      component: Rights
    }, {
      path: '/roles',
      component: Roles
    }]
  }]
})

// 挂在路由导航守卫
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 代表从哪个路径跳转而来
  // next 是一个函数,代表放行
  // next() 放行 next('/login) 强制跳转到登录页
  if (to.path === '/login') return next()
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})

export default router
